<template>
	<view v-if="cart.length">
		<!-- 地址选择组件 -->
		<my-address></my-address>
		<!-- 购物车商品列表的标题区域 -->
		<view class="cart-title">
			<!-- 左侧的图标 -->
			<uni-icons type="shop" size="18"></uni-icons>
			<!-- 描述文本 -->
			<text class="cart-title-text">购物车</text>
		</view>
		<!-- 商品列表区域 -->
		<uni-swipe-action>
			<block v-for="(goods, i) in cart" :key="goods.goods_id">
				<uni-swipe-action-item :right-options="options" @click="onClick(i)">
					<my-goods :goods="goods" showRadio showNum @radio-change="onRadioChange" @num-change="onNumChange"></my-goods>
				</uni-swipe-action-item>
			</block>
		</uni-swipe-action>
		<!-- 结算区域 -->
		<my-settle></my-settle>
	</view>
	<view class="empty-cart" v-else>
		<image src="/static/cart_empty@2x.png" class="empty-img"></image>
		<text class="tip-text">空空如也~</text>
	</view>
</template>

<script>
	import badgeMixin from '../../mixins/badge.js'
	import {
		mapState,
		mapMutations
	} from 'vuex'

	export default {
		data() {
			return {
				options: [{
					text: '删除',
					style: {
						backgroundColor: '#dd524d'
					}
				}]
			};
		},
		mixins: [badgeMixin],
		computed: {
			...mapState('m_cart', ['cart'])
		},
		methods: {
			...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoods']),
			// goods_state: 是要变为的状态，不是原状态
			onRadioChange(goods_id, goods_state) {
				// console.log(goods_id, goods_state)
				// 要修改商品状态,怎么做？
				// 必须要提交 mutations 
				this.updateGoodsState({
					goods_id,
					goods_state
				})
			},
			onNumChange(goods_id, goods_count) {
				this.updateGoodsCount({
					goods_id,
					goods_count
				})
			},
			onClick(index) {
				console.log(index)
				// 提交 mutation 移除 对应索引的商品
				this.removeGoods(index)
			}
		}
	}
</script>

<style lang="scss">
	.cart-title {
		height: 40px;
		display: flex;
		align-items: center;
		font-size: 14px;
		padding-left: 5px;
		border-bottom: 1px solid #efefef;

		.cart-title-text {
			margin-left: 10px;
		}
	}

	.cart-container {
		padding-bottom: 50px;
	}

	.empty-cart {
		display: flex;
		flex-direction: column;
		align-items: center;
		padding-top: 150px;

		.empty-img {
			width: 90px;
			height: 90px;
		}

		.tip-text {
			font-size: 12px;
			color: gray;
			margin-top: 15px;
		}
	}
</style>